mammary artery
The internal thoracic artery commonly used as a conduit for coronary artery bypass grafting, particularly to the left anterior descending artery.
Full Definition
The internal mammary artery, more precisely termed the internal thoracic artery, is a major arterial vessel that runs along the inner chest wall. In cardiac surgery, it is frequently harvested and used as a bypass conduit because of its excellent long-term patency rates. The left internal mammary artery (LIMA) is most commonly grafted to the left anterior descending coronary artery, while the right internal mammary artery (RIMA) may be used for other coronary targets. This arterial conduit is preferred over vein grafts due to superior durability and resistance to atherosclerosis.
Usage
Usage note: Use 'internal thoracic artery' in formal medical writing; 'mammary artery' is acceptable in surgical context.
In Context
- "The left mammary artery was harvested as a pedicled graft for LAD bypass." — operative note
- "Bilateral mammary artery grafting was performed to achieve complete arterial revascularization." — surgical plan